Polyethylene (PE) Washers

Tecafine® HDPE and LDPE

Like Tecafine PP, stamped washers and parts made from HDPE and LDPE have excellent resistance to acids and bases, and while their upper service temperature is not as good as PP, the low temperature toughness is notably better. Washers and spacers from these materials work well in outdoor service applications. Markets like winter sporting goods, building and construction, and refrigerator components value the low temperature impacts. LDPE will have better stress crack resistance then HDPE.

  • Broad chemical compatibility
  • Easy to machine
  • Good impact strength
  • Low moisture absorption

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Properties Condition Value Test Method Comment
Mechanical Modulus of elasticity (tensile test) @ 73°F 130,000 psi ASTM D 638
Tensile strength at break @ 73°F 4,700 psi ASTM D 638
Elongation at break @ 73°F 100 % ASTM D 638
Flexural strength @ 73°F 6,000-8,000 psi ASTM D 790
Modulus of elasticity (flexural test) @ 73°F 180,000 psi ASTM D 790
Notched impact strength (Izod) @ 73°F 0.9 ft-lbs/in ASTM D 256
Rockwell hardness R Scale 90 ASTM D 785
Thermal Melting temperature 330 °F 1) 1) Per ASTM D3418
Deflection temperature @ 264 psi 130 °F ASTM D 648
Thermal expansion (CLTE) 5*10-5 in/in/°F ASTM D 696
Electrical Volume resistivity @ 73°F 1*1017 Ω*cm ASTM D 257
Dielectric constant @ 60 Hz, 73°F, 50% RH 2.2 ASTM D 150
Other Moisture absorption @ 24 hours, 73°F 0.01-0.03 % ASTM D 570
Flammability (UL94) HB
This information is only to assist and advise you on current technical knowledge and is given without obligation or liability. All trade and patent rights should be observed. All rights reserved. Data obtained from extruded shapes material.
TECAFINE ™ PP – Ensinger Industries, Inc.

Mechanical

Property: Modulus of elasticity (tensile test)
Condition: @ 73°F
Value: 130,000 psi
Test Method: ASTM D 638
Comment:

Property: Tensile strength at break
Condition: @ 73°F
Value: 4,700 psi
Test Method: ASTM D 638
Comment:

Property: Elongation at break
Condition: @ 73°F
Value: 100 %
Test Method: ASTM D 638
Comment:

Property: Flexural strength
Condition: @ 73°F
Value: 6,000-8,000 psi
Test Method: ASTM D 790
Comment:

Property: Modulus of elasticity (flexural test)
Condition: @ 73°F
Value: 180,000 psi
Test Method: ASTM D 790
Comment:

Property: Notched impact strength (Izod)
Condition: @ 73°F
Value: 0.9 ft-lbs/in
Test Method: ASTM D 256
Comment:

Property: Rockwell hardness
Condition: R Scale
Value: 90 –
Test Method: ASTM D 785
Comment:

Thermal

Property: Melting temperature
Condition:
Value: 330 °F
Test Method: 1)
Comment: 1) Per ASTM D3418

Property: Deflection temperature
Condition: @ 264 psi
Value: 130 °F
Test Method: ASTM D 648
Comment:

Property: Thermal expansion (CLTE)
Condition:
Value: 5*10-5 in/in/°F
Test Method: ASTM D 696
Comment:

Electrical

Property: Volume resistivity
Condition: @ 73°F
Value: 1*1017 Ω*cm
Test Method: ASTM D 257
Comment:

Property: Dielectric constant
Condition: @ 60 Hz, 73°F, 50% RH
Value: 2.2 –
Test Method: ASTM D 150
Comment:

Other

Property: Moisture absorption
Condition: @ 24 hours, 73°F
Value: 0.01-0.03 %
Test Method: ASTM D 570
Comment:

Property: Flammability (UL94)
Condition:
Value: HB –
Test Method:
Comment:

This information is only to assist and advise you on current technical knowledge and is given without obligation or liability. All trade and patent rights should be observed. All rights reserved. Data obtained from extruded shapes material. TECAFINE ™ PP – Ensinger Industries, Inc.

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